Automatically threading shuttle for looms



Nov. 29V, 1927. 1,651,089

J GlLEs y 14 TTORNEY Patented Nov. 29, 1927.

UNITED STATES 1,651,089 PATENT OFFICE.

JOHN W. GILES, OF GREEK, SOUTH CAROLINA, ASSIGNOR TO DRAPERCORLPORATION, OF HOPEIDALE, MASSACHUSETTS, A CORPORATION 0F MAINE.

AUTOMATICALLY THREAD'ING SHUTTLE FOR LOOMS.

Application led March 19, 1927. Serial No. 176,771.

'Ihis invention relates to loom Shuttles which are automaticallythreaded'during the 'loom operation when filling replenishment theStimpson inventionhave been successful in practical operation, and eventhough the shuttle may become partially or wholly unthreaded on theoccurrence of overthrow as the shuttle comes to rest in the replenishing boX, it is immediately rethreaded on the next pickofthe shuttle.Owing to the fact that the threading block or thread passage olferslittle or no retardation to the thread movement during weaving, it hasbeen found desirable in weaving with certain kinds or characters offilling or thread to provide an appropriate form of thread ,tensioningmeans which will impart to the thread the desired tension as it is laidin the shed. l An important feature of the present invention thereforeconsists in providing an automatically threading shuttle forylooms lwitha thread tensioning devicepositioned transversely of A thelongitudinally vvextending thread passage at a point adjacent the bobbinchamber, and to provide in the thread passage between such threadYtensioning device and the side delivery eye a thread guide which mayact to maintainer-proper control of the thread. In accordance with thegeneral character of the invention, the thread guide may be formed as ascroll located in the thread passage between the tensioning device andside delivery eye. On the first piclr of the shuttle followingreplenishment, the thread swirls or balloons around the end of thelilling carrier lor bobbin in the bobbin chamber, and in the shuttledisclosed in the Stimpson patent, this swirling action of the lthreadenableszthe scroll to take control and thereaf'L r guide the threadduring the move .ment the shuttle' for the thread delivery' of one good'form thereof.

through the side delivery eye. In devising a propery tensioning devicefor the thread and yet permit its swirling action to place the thread inthe control of the scroll, the present invention provides a coiledspring, between the convolutions of which the swirling action of thethread will tend to place the thread as the shuttle is picked, and consequently to pass into control of the thread guiding device in thelongitudinally eXtending thread passage. n

In accordance with another feature of the present invention, the coiledspring tensioning device is mounted at the entrance of the thre'adpassage with the top ofthel coils thereof slightly above a portion 'ofthe thread guiding device or scroll, with the result that when thethread has passed into control of the scroll, it will also be placedbetween the convolutions of the spring coil and there remain until theoccurrence of an overthrow. v

`In accordance with another feature of the invention, the coiledspringrtensioning device is supported in a saddle secured to the loomshuttle adjacent the entrance to the longitudinally extending threadpassage and thread guiding means is employed for engaging the swirlingthread and directing it to the coiled spring tensioning device.

The invention and novel features thereof .willbesd be made clear fromthe following description and the accompanying drawings In the drawings:y

ig. 1 is a plan view `of the` eye end of a shuttle of the automaticallythreading type, having y the present invention associated therewith; j lFig. v2 is an enlarged cross-section on the Y' line 2-2l of Figli; y

Fig. Bis a perspective view oftheshuttle of 1Fig. 1, vcontaining thepresent invention; anc Fig. l is a perspective detail, showing thesaddle and the spring coil tensioningr device being assembled.

The shuttle 1 is provided with the bobbin chamber l 2 and frontward ofthe bobbin chamber is the longitudinally Y extending thread passage 3terminating in a bridge, laterally of which is the sidev delivery eye 4.In, the illustrated form of the invention Athe shuttle-,is provided witha t"" .in block tf,- im shawn in the present instance ,as ofsiiilristans Y will cause the thread to pass upwardly 'from the threadpassage and the shuttle become either partially or wholly unthreaded..On the next lpiclr of the shuttle, however, the shuttle will becomerethreaded in a vmanner simi-lary to that described in more detail intheStimpson patent.

The thread tensioning device consists ot a springcoil 7 which entendstransversely ot the thread passage adiacentthe bobbin chamber, so thatthe scroll is between the tensioning device and the side delivery eyeand thus serves to guide the .thread through the tensioning device.

As indicated in the drawings, the spring coil tensioning` device 7 issupported by a 'saddle 8., one of the side .arms 9 of which is extendedupwardly and `at its upper end is 4provided with a portion 1() having anopening 11 tor the reception-ot a screw or other securing device 12 torholding. such side portions of the saddle in position adjacent thebobbin chamber.

The opposite side portion 13 of the saddle is similarlyvv rnendedupwardly .and at its .upper end is bent or turned, as at 1+i, toYpronvide a downwardly extending spring tension .adjusting inen'iber 1 5.Thelower end portion ol' the spring tension adjusting member 15` visprovided withy an opening 16 and through said opening and holes 17 inthe upwardly extending 'side members .of the saddle is passed thebolt13, one end of which maybe suitably threaded, as at 1.79, to receiveaznut or other securing'means 20, and the biturcated endv portion 16 otthe spring adjusting member 15 stra'ddles the bolt and is guided therebyas it is bent more or less, as will hereinafter be described, to.properly s paoethe coils of the spring tensioning device in accordancewith the size of the thread in use The shuttle woodis vrecessed or cutaway at`21, best shown in Fig. 2, to receive the upwardly extending sidemember 1 3 and the Aspring tensioning member 15 and house these parts7especially .at their upper portions, to

ebstructicm during its swirling` action as itv a misi-tienes indicatedat c Fie. 2 and to.V

maintainltlie parts in ythis lassociated relation `the spring-tensioningmember is .pro-

'yvided with an additional supporting device .to support the scrollrelative to the supportimg sad lle. Such supporting device, as indicatedin Figs. 2 and i, may vlbeconstituted iby a bent member 22, a simpleVform of which is shownas a wire having one ileg 23 extendingvdownwardzly at the outer side of the upwardly extending side member 13and its upper portion formed as a, loop,*afs .at 24,

trom which point the wire is `bent downwardly. M25, to constitute athread guide leading to the spring coil tensioning member. .hedownwardly extending threadguiding portion 25 engages one of the sidecoils or convolutions oi the spring tensioningl mem- Vber 'l' und passesthrough an opening26 in the adgustmg. member 15, and 1s then eX- ltended .laterally through an :opening in the upwardly extending sidemember 13 vot the saddle, as indicated 23, Fig. 2. lThe result is thatthe spring supporting member 22 acts not only tofhold the springtensioning .mem-` ber 7 in ,its floating position at the entrance 'ofthe longitudinally extending thread passage, Vbut also asa thread guideto engage the swirling thread and direct it to a position upon orbetween the coils vof the spring tensioning device. i y

In using thread` of relatively large count or s i z e,j the convolutionsof the spring -tensioning member should be farther apart Vwhen fusingthread oit liner .countor smaller size, in order to gage the properten-Vsion suitable to .tlie`-tl1rjead in use, To effect proper adjustmentot' the con'volutions ot the spring tensioning member, the downwardlyextending portion 15' ot' the saddle may be bent in either' direction,one to elosethe lc onvolutions oif the rspring ytensioning' mem ber, and.the l,other to widen the espace between the coils. To readily etiiectthis character of adjustment, the saddle may bemade vot appropriatematerial, such, lfor instance, as brass, composition, or other metal, sothat yby the insertion ot an instrument from` the .bobbin' .chamber intothe spacev between the side member 13- and the adjusting member bringthe coils oit' the tensioning member into .closer relation when usingtine count orsmall yarn, and similarly, when. a lyarn of .coarser count0r letsel' thread 1semp10yed,the acl- 1 5.v these two parts may beseparated to c be noted, as shown in Fig. 2, that when the thread isunder control of the guiding devicer or scroll, it will be drawn fromthe bobbin chamber into a plane sufficiently low to cause the thread toremain between the coils of the spring tensioning memberand should anoverthrow occur as the shuttle is brought to rest in the replenishingbox, the thread a may pass upwardly -from the spring tensioning memberand be cast upwardly out of the thread passage by the thread casting andguiding scroll.

It is believed this is the first instance in the artwhere a threadtensioning member constituted as a spring coil has been associated withan automatically threading shuttle for looms and positioned at theentra-nce to the longitudinally extending. thread passage adjacent thelbobbin chamber, so that the swirling action of the thread as it iswithdrawn :trom the bobbin will cause the thread to automatically beengaged between the coils of thespring tensioning member,

and yet permit such thread on the occurrence ot' an overthrow to passupwardly from the thread passage. It will also be apparent that thethread guiding device for directing the thread to the side delivery eyeduring weaving is mounted in the longitudinally extending threadypassage between the coiled spring tensioning member and the sidedelivery eye, so that when once the shuttle is threaded, the threadguiding device will maintain the thread in its tensioning positionbetween the coils of the spring tensioning member.

What is claimed is:

1. In an automatically threading shuttle for looms, the combination ofthe shuttle having a longitudinally extending thread passage providedwith a bridge at its forward end and side delivery eye, a resilienttensioning member at the entrance of the thread passage adjacent thebobbin chamber, and a thread guiding device in the thread passagebetween the tensioning member andthe bridge at the forward end of thelongitudinal thread passage to depress the thread into the tensioningmemberpasthe thread is withdrawn from the shuttle on the first pick ofthe shuttle following replenishment.

2. In an automatically threading loom shuttle` the combination of theshuttle having a longitudinally extending thread passage, a resilienttensioning member at the entrance oit the longitudinally extendingthread passage adjacentl the bobbin chamber,

and a thread casting and guiding device in the thread passage betweenthe resilient tensioning member and the side delivery eye.

3. In' an automatically threading loom shuttle, the combination of theshuttle having a longitudinally extending thread passage, a resilienttensioning member at the `entrance of the llongitudinally extendingthreadpassage'adjacent the bobbin chamber, and a scroll device in thelongitudinally extending thread passage between the resilient tensioningmember and side delivery eye.

4. In an automatically threading Y loom shuttle, the combination of theshuttle vhaving a longitudinally extending thread passage, a resilienttensioning member at the lentrance vof the longitudinally extendingthread passage adjacent lthe bobbinl chain-V ber, and a thread guidingscroll in the thread passage having a part thereof below the top of thetensioning device to causeythe thread to pass into control of thetensioning device as'tlie shuttle is threaded.

5. In an automatically threading shuttle torflooms, the combination otthe shuttle having al longitudinally extending thread passage and sidedelivery eye, a coiled spring tensioning device at the entrance to thethread passage adjacent thebobbin chamber, and a scroll in thethread-passage between the coiled spring tensioning device and sidedelivery eye.

6. In an automatically threading shuttle for looms, the combination ofthe shuttle having a longitudinally extending thread passage and sidedelivery eye,acoiled spring tensioning device at the entrance to thethread passage adjacent the bobbin chamber, and a thread casting andguiding scroll in the thread passage between the coiled springtensioning device and side delivery eye.

7. In an'v automatically threading shuttle for looms, the combination ofthe shuttle having a longitudinally extending thread passage and sidedelivery eye, a coiled spring tensioning device at the entrance .to the`thread passage adjacent the bobbin chamber,

having a longitudinally extending threadv passage, acoiled spring threadtensioning member at the entrance to the thread passage adjacent thebobbin chamber, and a support for the coiledl spring tensioning membersecured to the shuttle body to position the coiled spring for engagementby the thread as it is withdrawn from the bob-l bin chamber.Y j

9. A thread tensioning device for automatically threading shuttles forlooms, enmlprisinga eoiled-spring bet-Ween' the convolu-== f tionsotYwhichtheA (thread is fdrawn; a supf porting-saddle `fori l,the coiledspiring secured to' the :shuttle a'dgacent'they bobbin chamber 5- Vtoposition the coiled I springl to ieaus'e. thefun- Windingthre'ad itv isWithdrawn from the'A 1 bobbin towenter between the coils of theifspring, and vthread gnidingfmeans fordirect-y ing: the un-Windinglthread' at thewentrance ,to.the.thread'passage into engagement withthe-coiled spring. l l

:-10;'i-.vthreadtensloningI device' for autominaticallyI tl-ireadinoshuttles ifor looms, com-4 I. prising a coiled spring between theconvolu`l= tionsoii\vh1ch the thread vis drawn, af'supj Aporting .saddlelor the `coiled spring securedl v.

fthe.coiledqspringfsaid supporti-ng saddle be-f @ing a portionlfor-a'djnsting the space be--v tWeenthe convolutions oit the coiledspring :iny accordance with the vsize 'of the thread.

L11. y.Afthread tensioning dev-icePfor auto-1 maticallythreadingshuttles for looms, coinprisi ng a=eoiled spring. betfweenjftheconvolutions of :which r they thread iswdrawn, a fsup porting lsaddle'or-` the -coiledyspiiing secured toy the:shuttley adjacent'the ibobbin4'chamber toy position the' coiled spring to cause the :unwinding threadas itis `withdrawn from the bobbin to enter-betweenthe-fcoils-of thespring-and means fory supporting ythe coiled -springrelative tothe-s-addleinposition to intersect thepath'fof the thread in thefthreadpassage `12; Anan-tomat-ically1 threading shuttle 'for loonisfhavingasidedelivery eyefand a threading block provided with a longitudinallyextending tliread-"passage, a thread tensioningl member at'the entranceof-=tl1e thread passage achacentthe bobbinchamber,

Aand a thread .guide seemed in the longitudinally extending threadpassagebetween vthe tenssonlnginember 'and theliront end 'of the fpassage f and below the rtop oi' I the threading 'block to act` upon the`thread as it is'delivered -flrom'the shuttle 'andcause it'to-be *drawnythrough the thread--tensioning'member on .the lirst pick following:replenishment y In testimony whereof, I havel'slgned my name to thisspeciiieation.

:JoHN eines.

